Just about everyday that I go to start my 66 289 I have a problem keeping it running/idling. Actually starting it is no issue, it fires right up as soon as I turn the key but if I don’t apply a bit of pressure on the gas pedal it sputters out and dies. There are even times where I’ll get it to idle in park for 5 or 6 minutes, throw it into drive or reverse and THEN it decides to sputter out and die. Not exactly sure what the issue is? It recently got a tune in Tulsa, OK and I drove it all the way back here to Los Angeles but along the way had to replace the alternator and battery. Could it just need another tune to be adjusted to residing in LA? Your wisdom is welcome!